Javafx在tableview中更改过滤列表的字体颜色

Question

简单代码

       String sDriverName = "org.sqlite.JDBC";
        try {
            Class.forName(sDriverName);
            String sTempDb = "systemnet.db";
            String sJdbc = "jdbc:sqlite";
            String sDbUrl = sJdbc + ":" + sTempDb;
             // create a database connection
            Connection conn = DriverManager.getConnection(sDbUrl);
            try {
                Statement stmt = conn.createStatement();
                try {

                     try {            
          connected();
             data = FXCollections.observableArrayList();
            ResultSet rs = stmt.executeQuery("SELECT * from Belgiler");
              while (rs.next()) {
                data.add(new form1Controller.userdata(rs.getString(1),rs.getString(2),rs.getString(3),rs.getString(4)));
              }
             cid.setCellValueFactory(new PropertyValueFactory("id"));
             ctwo.setCellValueFactory(new PropertyValueFactory("two"));
             csec.setCellValueFactory(new PropertyValueFactory("sec"));
             ctri.setCellValueFactory(new PropertyValueFactory("tri"));
              tablesettings.setItems(null);
              tablesettings.setItems(data);
              tablesettings.setEditable(true);
            closed();
        } catch (Exception e) {System.out.println("Error on Building Data"+ e.toString());

        }

                } finally {
                    try { stmt.close(); } catch (Exception ignore) {}
                }
            } finally {
                try { conn.close(); } catch (Exception ignore) {}
            }
        }   catch (Exception ex) {
            Logger.getLogger(form1Controller.class.getName()).log(Level.SEVERE, null, ex);
        }


       FilteredList<userdata> filt = new FilteredList<>(data, p ->true);
            textfield1.textProperty().addListener((observable, oldValue, newValue) -> { 
            filt.setPredicate(userdata -> {
            if (newValue == null || newValue.isEmpty()) {
                    return true;
                }  
                String lowerCaseFilter = newValue.toLowerCase();
           if (userdata.two.toString().toLowerCase().contains(lowerCaseFilter)) {
               return true; // change font color
                } else if (userdata.sec.toString().toLowerCase().contains(lowerCaseFilter)) {
                    return true; 
                }
                return false; // Does not match.
            });SortedList<userdata> sortedData = new SortedList<>(filt);
        sortedData.comparatorProperty().bind(tablesettings.comparatorProperty());
        tablesettings.setItems(sortedData);
        });

Answer 1

使用自定义的TableCell来观察search text属性，并对其图形而不是纯文本使用TextFlow。当search text属性更改时，或者从UpdateItem（...）方法中查找项中搜索文本的出现，并从块中生成文本流，以便可以突出显示适当的块。

这里有一个简单的例子，它只突出显示文本的第一次出现；如果您愿意，可以修改它以突出显示所有出现的情况：

import javafx.beans.value.ObservableValue;
import javafx.scene.control.ContentDisplay;
import javafx.scene.control.TableCell;
import javafx.scene.text.Text;
import javafx.scene.text.TextFlow;

public class HighlightingTableCell<S> extends TableCell<S, String> {

    private final ObservableValue<String> highlightText ;

    private final TextFlow textFlow ;

    public HighlightingTableCell(ObservableValue<String> highlightText) {
        this.highlightText = highlightText ;
        this.textFlow = new TextFlow() ;
        textFlow.setPrefHeight(12);

        highlightText.addListener((obs, oldText, newText) -> {
            updateTextFlow(newText);
        });

        setContentDisplay(ContentDisplay.GRAPHIC_ONLY);
    }

    @Override
    public void updateItem(String item, boolean empty) {
        super.updateItem(item, empty);
        if (empty) {
            setGraphic(null);
        } else {
            updateTextFlow(highlightText.getValue());
            setGraphic(textFlow);
        }
    }


    private void updateTextFlow(String highlight) {
        if (isEmpty()) {
            return ;
        }

        String item = getItem();
        int index = item.indexOf(highlight);

        if (highlight.isEmpty() || index < 0) {
            Text text = new Text(item);
            textFlow.getChildren().setAll(text);
            return ;
        }

        Text prior = new Text(item.substring(0, index));
        Text highlighted = new Text(item.substring(index, index+highlight.length()));
        highlighted.getStyleClass().add("highlight");
        Text post = new Text(item.substring(index+highlight.length()));     
        textFlow.getChildren().setAll(prior, highlighted, post);

    }


}

下面是一个快速的测试案例：

import javafx.application.Application;
import javafx.beans.binding.Bindings;
import javafx.beans.property.SimpleStringProperty;
import javafx.beans.property.StringProperty;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.collections.transformation.FilteredList;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.control.TextField;
import javafx.scene.layout.BorderPane;
import javafx.stage.Stage;

public class HighlightingFilteredTable extends Application {

    @Override
    public void start(Stage primaryStage) {
        TableView<Person> table = new TableView<>();

        TextField searchField = new TextField();
        searchField.setPromptText("Enter filter text");

        TableColumn<Person, String> firstNameColumn = new TableColumn<>("First Name");
        firstNameColumn.setCellValueFactory(cellData -> cellData.getValue().firstNameProperty());
        firstNameColumn.setCellFactory(tc -> new HighlightingTableCell<>(searchField.textProperty()));

        TableColumn<Person, String> lastNameColumn = new TableColumn<>("Last Name");
        lastNameColumn.setCellValueFactory(cellData -> cellData.getValue().lastNameProperty());
        lastNameColumn.setCellFactory(tc -> new HighlightingTableCell<>(searchField.textProperty()));

        table.getColumns().add(firstNameColumn);
        table.getColumns().add(lastNameColumn);

        ObservableList<Person> allData= FXCollections.observableArrayList(
                new Person("Jacob", "Smith"),
                new Person("Isabella", "Johnson"),
                new Person("Ethan", "Williams"),
                new Person("Emma", "Jones"),
                new Person("Michael", "Brown")
        );

        FilteredList<Person> filteredList = new FilteredList<>(allData);
        filteredList.predicateProperty().bind(Bindings.createObjectBinding(() -> 
            person -> person.getFirstName().contains(searchField.getText()) || person.getLastName().contains(searchField.getText()), 
            searchField.textProperty()));

        table.setItems(filteredList);

        BorderPane.setMargin(searchField, new Insets(5));
        BorderPane root = new BorderPane(table,searchField, null, null, null);
        Scene scene = new Scene(root);
        scene.getStylesheets().add("style.css");
        primaryStage.setScene(scene);
        primaryStage.show();
    }

    public static class Person {
        private final StringProperty firstName = new SimpleStringProperty();
        private final StringProperty lastName = new SimpleStringProperty();

        public Person(String firstName, String lastName) {
            setFirstName(firstName);
            setLastName(lastName);
        }

        public final StringProperty firstNameProperty() {
            return this.firstName;
        }


        public final String getFirstName() {
            return this.firstNameProperty().get();
        }


        public final void setFirstName(final String firstName) {
            this.firstNameProperty().set(firstName);
        }


        public final StringProperty lastNameProperty() {
            return this.lastName;
        }


        public final String getLastName() {
            return this.lastNameProperty().get();
        }


        public final void setLastName(final String lastName) {
            this.lastNameProperty().set(lastName);
        }



    }

    public static void main(String[] args) {
        launch(args);
    }
}

使用style.css：

.table-cell .highlight {
    -fx-fill: red ;
}